640199280

素因数分解:

$2^4\times 3^1\times 5^1\times 7^1\times {\mathrm{381071}}^1$

素因数の和:381094

約数の個数: 80

約数和(自身を含む): 2268140544

約数和(自身を除く): 1627941264

約数列:

[1, 2, 3, 4, 5, 6, 7, 8, 10, 12, 14, 15, 16, 20, 21, 24, 28, 30, 35, 40, 42, 48, 56, 60, 70, 80, 84, 105, 112, 120, 140, 168, 210, 240, 280, 336, 420, 560, 840, 1680, 381071, 762142, 1143213, 1524284, 1905355, 2286426, 2667497, 3048568, 3810710, 4572852, 5334994, 5716065, 6097136, 7621420, 8002491, 9145704, 10669988, 11432130, 13337485, 15242840, 16004982, 18291408, 21339976, 22864260, 26674970, 30485680, 32009964, 40012455, 42679952, 45728520, 53349940, 64019928, 80024910, 91457040, 106699880, 128039856, 160049820, 213399760, 320099640, 640199280]

約数ペア:

[(1, 640199280), (2, 320099640), (3, 213399760), (4, 160049820), (5, 128039856), (6, 106699880), (7, 91457040), (8, 80024910), (10, 64019928), (12, 53349940), (14, 45728520), (15, 42679952), (16, 40012455), (20, 32009964), (21, 30485680), (24, 26674970), (28, 22864260), (30, 21339976), (35, 18291408), (40, 16004982), (42, 15242840), (48, 13337485), (56, 11432130), (60, 10669988), (70, 9145704), (80, 8002491), (84, 7621420), (105, 6097136), (112, 5716065), (120, 5334994), (140, 4572852), (168, 3810710), (210, 3048568), (240, 2667497), (280, 2286426), (336, 1905355), (420, 1524284), (560, 1143213), (840, 762142), (1680, 381071)]